Ubuntu is joining the vendor-specific Linux certification scene alongside Red Hats RHCT/RHCE/RHCA/RHCSS and Novells CLP and CLE, and they are doing so by building upon the vendor-neutral LPI certifications
Read about the announcement here
From Q1 2007 delegates will be able to prepare for, and achieve, the qualification by attending two five day courses available via a global network of partners. They are the first in a series of classroom-based and e-learning courses designed to enable System Administrators to pass the required LPI 101, LPI 102 and the Ubuntu (LPI 199) exams.
You can also read about it at the Ubuntu website